206505047 has 8 divisors (see below), whose sum is σ = 236525856. Its totient is φ = 176614272.

The previous prime is 206505041. The next prime is 206505059. The reversal of 206505047 is 740505602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206505047 - 2⁴ = 206505031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206505041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29078 + ... + 35475.

It is an arithmetic number, because the mean of its divisors is an integer number (29565732).

Almost surely, 2^206505047 is an apocalyptic number.

206505047 is a deficient number, since it is larger than the sum of its proper divisors (30020809).

206505047 is an equidigital number, since it uses as much as digits as its factorization.

206505047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65017.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 206505047 is about 14370.2834697162. The cubic root of 206505047 is about 591.0763145564.

The spelling of 206505047 in words is "two hundred six million, five hundred five thousand, forty-seven".